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Creating a file with 0666 permissions and chmod post fact is the wrong way to do it.
openat(AT_FDCWD, "/var/lib/columnstore/data1/systemFiles/dbrm/oidbitmap", O_RDWR|O_CREAT|O_TRUNC, 0666) = -1 ENOENT (No such file or directory)
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futex(0x7fffb75b120c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
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chmod("/var/lib/columnstore/data1/systemFiles/dbrm/oidbitmap", 0664) = -1 ENOENT (No such file or directory)
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Set umask before files are opened.
per: versioning/BRM/oidserver.cpp
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umask use
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:~/mariadb-server-10.5/storage/columnstore/columnstore$ git grep umask
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procmon/main.cpp: umask(0);
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versioning/BRM/oidserver.cpp: chmod(fFilename.c_str(), 0664); // XXXPAT: override umask at least for testing
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versioning/BRM/save_brm.cpp: (void)::umask(0);
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versioning/BRM/script-fcns:# Make sure umask is sane
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versioning/BRM/script-fcns:umask 022
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